\tracingonline=2
\tracingcommands=2
\tracingmacros=2
\tracingrestores=2

\catcode`{=1
\catcode`}=2

\noexpand\number2
\noexpand\noexpand\number2
\noexpand\count1=2
\showthe\count1

\newlinechar=`@
\message{@}
\message{~ \noexpand\number--25@}
\message{~ \noexpand\noexpand\number--25@}

\count\noexpand\number=10
\count1=\noexpand\romannumeral33 % \romannumeral is executed here !
\year=12\noexpand\romannumeral34 % and here

\end

